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Diffstat (limited to 'board/netstal/hcu5/sdram.c')
-rw-r--r--board/netstal/hcu5/sdram.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/board/netstal/hcu5/sdram.c b/board/netstal/hcu5/sdram.c
new file mode 100644
index 0000000..f7d6865
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+++ b/board/netstal/hcu5/sdram.c
@@ -0,0 +1,299 @@
+/*
+ * (C) Copyright 2007
+ * Niklaus Giger (Niklaus.Giger@netstal.com)
+ * (C) Copyright 2006
+ * Sylvie Gohl, AMCC/IBM, gohl.sylvie@fr.ibm.com
+ * Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com
+ * Thierry Roman, AMCC/IBM, thierry_roman@fr.ibm.com
+ * Alain Saurel, AMCC/IBM, alain.saurel@fr.ibm.com
+ * Robert Snyder, AMCC/IBM, rob.snyder@fr.ibm.com
+ *
+ * (C) Copyright 2006
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* define DEBUG for debug output */
+#undef DEBUG
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/mmu.h>
+#include <ppc440.h>
+
+void sysLedSet(u32 value);
+void dcbz_area(u32 start_address, u32 num_bytes);
+void dflush(void);
+
+#define DDR_DCR_BASE 0x10
+#define ddrcfga (DDR_DCR_BASE+0x0) /* DDR configuration address reg */
+#define ddrcfgd (DDR_DCR_BASE+0x1) /* DDR configuration data reg */
+
+#define DDR0_01_INT_MASK_MASK 0x000000FF
+#define DDR0_00_INT_ACK_ALL 0x7F000000
+#define DDR0_01_INT_MASK_ALL_ON 0x000000FF
+#define DDR0_01_INT_MASK_ALL_OFF 0x00000000
+
+#define DDR0_17_DLLLOCKREG_MASK 0x00010000 /* Read only */
+#define DDR0_17_DLLLOCKREG_UNLOCKED 0x00000000
+#define DDR0_17_DLLLOCKREG_LOCKED 0x00010000
+
+#define DDR0_22 0x16
+/* ECC */
+#define DDR0_22_CTRL_RAW_MASK 0x03000000
+#define DDR0_22_CTRL_RAW_ECC_DISABLE 0x00000000 /* ECC not enabled */
+#define DDR0_22_CTRL_RAW_ECC_CHECK_ONLY 0x01000000 /* ECC no correction */
+#define DDR0_22_CTRL_RAW_NO_ECC_RAM 0x02000000 /* Not a ECC RAM*/
+#define DDR0_22_CTRL_RAW_ECC_ENABLE 0x03000000 /* ECC correcting on */
+#define DDR0_03_CASLAT_DECODE(n) ((((unsigned long)(n))>>16)&0x7)
+
+#ifdef CFG_ENABLE_SDRAM_CACHE
+#define MY_TLB_WORD2_I_ENABLE 0 /* enable caching on DDR2 */
+#else
+#define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE /* disable caching on DDR2 */
+#endif
+
+void program_tlb(u32 phys_addr, u32 virt_addr, u32 size, u32 tlb_word2_i_value);
+
+#ifdef CONFIG_ADD_RAM_INFO
+void board_add_ram_info(int use_default)
+{
+ PPC440_SYS_INFO board_cfg;
+ u32 val;
+ mfsdram(DDR0_22, val);
+ val &= DDR0_22_CTRL_RAW_MASK;
+ switch (val) {
+ case DDR0_22_CTRL_RAW_ECC_DISABLE:
+ puts(" (ECC disabled");
+ break;
+ case DDR0_22_CTRL_RAW_ECC_CHECK_ONLY:
+ puts(" (ECC check only");
+ break;
+ case DDR0_22_CTRL_RAW_NO_ECC_RAM:
+ puts(" (no ECC ram");
+ break;
+ case DDR0_22_CTRL_RAW_ECC_ENABLE:
+ puts(" (ECC enabled");
+ break;
+ }
+
+ get_sys_info(&board_cfg);
+ printf(", %d MHz", (board_cfg.freqPLB * 2) / 1000000);
+
+ mfsdram(DDR0_03, val);
+ val = DDR0_03_CASLAT_DECODE(val);
+ printf(", CL%d)", val);
+}
+#endif
+
+/*--------------------------------------------------------------------
+ * wait_for_dlllock.
+ *--------------------------------------------------------------------*/
+static int wait_for_dlllock(void)
+{
+ unsigned long val;
+ int wait = 0;
+
+ /* -----------------------------------------------------------+
+ * Wait for the DCC master delay line to finish calibration
+ * ----------------------------------------------------------*/
+ mtdcr(ddrcfga, DDR0_17);
+ val = DDR0_17_DLLLOCKREG_UNLOCKED;
+
+ while (wait != 0xffff) {
+ val = mfdcr(ddrcfgd);
+ if ((val & DDR0_17_DLLLOCKREG_MASK) ==
+ DDR0_17_DLLLOCKREG_LOCKED)
+ /* dlllockreg bit on */
+ return 0;
+ else
+ wait++;
+ }
+ debug("0x%04x: DDR0_17 Value (dlllockreg bit): 0x%08x\n", wait, val);
+ debug("Waiting for dlllockreg bit to raise\n");
+
+ return -1;
+}
+
+/***********************************************************************
+ *
+ * sdram_panic -- Panic if we cannot configure the sdram correctly
+ *
+ ************************************************************************/
+void sdram_panic(const char *reason)
+{
+ printf("\n%s: reason %s", __FUNCTION__, reason);
+ sysLedSet(0xff);
+ while (1) {
+ }
+ /* Never return */
+}
+
+#ifdef CONFIG_DDR_ECC
+static void blank_string(int size)
+{
+ int i;
+
+ for (i=0; i<size; i++)
+ putc('\b');
+ for (i=0; i<size; i++)
+ putc(' ');
+ for (i=0; i<size; i++)
+ putc('\b');
+}
+/*---------------------------------------------------------------------------+
+ * program_ecc.
+ *---------------------------------------------------------------------------*/
+static void program_ecc(unsigned long start_address, unsigned long num_bytes,
+ unsigned long tlb_word2_i_value)
+{
+ unsigned long current_address= start_address;
+ int loopi = 0;
+ u32 val;
+
+ char str[] = "ECC generation -";
+ char slash[] = "\\|/-\\|/-";
+
+ sync();
+ eieio();
+
+ puts(str);
+
+ if (tlb_word2_i_value == TLB_WORD2_I_ENABLE) {
+ /* ECC bit set method for non-cached memory */
+ /* This takes various seconds */
+ for(current_address = 0; current_address < num_bytes;
+ current_address += sizeof(u32)) {
+ *(u32 *)current_address = 0;
+ if ((current_address % (2 << 20)) == 0) {
+ putc('\b');
+ putc(slash[loopi++ % 8]);
+ }
+ }
+ } else {
+ /* ECC bit set method for cached memory */
+ /* Fast method, no noticeable delay */
+ dcbz_area(start_address, num_bytes);
+ dflush();
+ }
+ blank_string(strlen(str));
+
+ /* Clear error status */
+ mfsdram(DDR0_00, val);
+ mtsdram(DDR0_00, val | DDR0_00_INT_ACK_ALL);
+
+ /* Set 'int_mask' parameter to functionnal value */
+ mfsdram(DDR0_01, val);
+ mtsdram(DDR0_01, ((val &~ DDR0_01_INT_MASK_MASK) |
+ DDR0_01_INT_MASK_ALL_OFF));
+
+ return;
+}
+
+#endif
+
+/***********************************************************************
+ *
+ * initdram -- 440EPx's DDR controller is a DENALI Core
+ *
+ ************************************************************************/
+long int initdram (int board_type)
+{
+#define HCU_HW_SDRAM_CONFIG_MASK 0x7
+#define INVALID_HW_CONFIG "Invalid HW-Config"
+ uint16_t *hwVersReg = (uint16_t *) HCU_HW_VERSION_REGISTER;
+ unsigned int dram_size=0;
+ mtsdram(DDR0_02, 0x00000000);
+
+ /* Values must be kept in sync with Excel-table <<A0001492.>> ! */
+ mtsdram(DDR0_00, 0x0000190A);
+ mtsdram(DDR0_01, 0x01000000);
+ mtsdram(DDR0_03, 0x02030602);
+ mtsdram(DDR0_04, 0x0A020200);
+ mtsdram(DDR0_05, 0x02020307);
+ switch (*hwVersReg & HCU_HW_SDRAM_CONFIG_MASK) {
+ case 0:
+ dram_size = 128 * 1024 * 1024 ;
+ mtsdram(DDR0_06, 0x0102C80D); // 128MB RAM
+ mtsdram(DDR0_11, 0x000FC800); // 128MB RAM
+ mtsdram(DDR0_43, 0x030A0300); // 128MB RAM
+ break;
+ case 1:
+ dram_size = 256 * 1024 * 1024 ;
+ mtsdram(DDR0_06, 0x0102C812); // 256MB RAM
+ mtsdram(DDR0_11, 0x0014C800); // 256MB RAM
+ mtsdram(DDR0_43, 0x030A0200); // 256MB RAM
+ break;
+ default:
+ sdram_panic(INVALID_HW_CONFIG);
+ break;
+ }
+ dram_size -= 16 * 1024 * 1024;
+ mtsdram(DDR0_07, 0x00090100);
+ // TCPD=200 cycles of clock input is required to lock the DLL.
+ // CKE must be HIGH the entire time.mtsdram(DDR0_08, 0x02C80001);
+ mtsdram(DDR0_08, 0x02C80001);
+ mtsdram(DDR0_09, 0x00011D5F);
+ mtsdram(DDR0_10, 0x00000100);
+ mtsdram(DDR0_12, 0x00000003);
+ mtsdram(DDR0_14, 0x00000000);
+ mtsdram(DDR0_17, 0x1D000000);
+ mtsdram(DDR0_18, 0x1D1D1D1D);
+ mtsdram(DDR0_19, 0x1D1D1D1D);
+ mtsdram(DDR0_20, 0x0B0B0B0B);
+ mtsdram(DDR0_21, 0x0B0B0B0B);
+ #define ECC_RAM 0x03267F0B
+ #define NO_ECC_RAM 0x00267F0B
+#ifdef CONFIG_DDR_ECC
+ mtsdram(DDR0_22, ECC_RAM);
+#else
+ mtsdram(DDR0_22, NO_ECC_RAM);
+#endif
+
+ mtsdram(DDR0_23, 0x00000000);
+ mtsdram(DDR0_24, 0x01020001);
+ mtsdram(DDR0_26, 0x2D930517);
+ mtsdram(DDR0_27, 0x00008236);
+ mtsdram(DDR0_28, 0x00000000);
+ mtsdram(DDR0_31, 0x00000000);
+ mtsdram(DDR0_42, 0x01000006);
+ mtsdram(DDR0_44, 0x00000003);
+ mtsdram(DDR0_02, 0x00000001);
+ wait_for_dlllock();
+ mtsdram(DDR0_00, 0x40000000); /* Zero init bit */
+
+ /*
+ * Program tlb entries for this size (dynamic)
+ */
+ program_tlb(0, 0, dram_size, MY_TLB_WORD2_I_ENABLE);
+
+ /*
+ * Setup 2nd TLB with same physical address but different virtual
+ * address with cache enabled. This is done for fast ECC generation.
+ */
+ program_tlb(0, CFG_DDR_CACHED_ADDR, dram_size, 0);
+
+#ifdef CONFIG_DDR_ECC
+ /*
+ * If ECC is enabled, initialize the parity bits.
+ */
+ program_ecc(CFG_DDR_CACHED_ADDR, dram_size, 0);
+#endif
+
+ return (dram_size);
+}
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